Gardai in Carrick on Shannon have arrested one man after discovering a "highly sophisticated" cannabis grow house.
More than 250 plants were discovered in the house, near Carrigallen village.
The plants, which were in the mature stage of growth, have an estimated street value of around €200,000.
One man in his early 50s was arrested and is being detained at Carrick-on-Shannon Garda Station under Section 2 of the Criminal Justice (Drug Trafficking) Act, 1996.
The house is sealed off for an ongoing forensic technical examination according to gardai.
It is the second significant growhouse discovered by gardai in recent days.
On Friday gardai in north Dublin discovered a growhouse in Drumcondra and arrested one man in connection with the discovery
"As part of an intelligence lead operation, Gardaí carried out a search at a house in the Drumcondra area on 2nd January 2017 and discovered a 'grow house'.
"120 cannabis plants (analysis pending) with an estimated value of €96,000 were recovered.
"A man in his 30s was arrested and detained at Mountjoy Garda Station under the Misuse of Drugs Acts. He was later charged and is currently before the courts in connection with the case," gardai said in a statement.